Work-supporting frame



(N0 Model.)

0. G. JOHNSEN; WORK' SUPPORTING FRAME.

Patented Sept. 26, 1882.,

N4 PETERS Phnlu-Mhographon Wnshingkm. D c,

UNITED STATES PATENT Orrrcn.

CHARLES e. JonNsnN, on NEW ORLEANS, LOUISIANA.

WORK-SUPPORTING FRAMQE.

SPECIFICATION forming part of Letters Patent No. 265,093, dated September 26, 1882.

' Application fiied March 28, 1882 (No model.)

To all whom it may concern:

Be it known that I, CHARLES G. J OHNSEN, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented new and useful Improvements in Riveting-lvlachiues, of which the following is a specification.

This invention relates to certain improvements in the work-supporting frame of riveting-machines, its object being to provide de vices for raisin g the boiler-ring from the lower die, so as to admit of the work being shifted and rivets inserted. in the holes; and the invention consists, first, in the combination of a born or anvil and the riveting dies with a work-supporting frame provided with rollers on which the work rests, and treadle mechanism for raising and lowering the work sup porting frame, as hereinafter described; second,in the combination, with a horn or anvil and riveting-dies, of a work-supportin g frame composed of arms carrying rollers on which the work rests, a vertical post connected with the roller carrying arms, and a pivoted lever connected with the post at one end and at the other end connected with atreadle, as hereinafter set forth.

In the accompanying drawing, which represents-a sectional elevation of a riveting-machine with myimproved work-supportingframe appliedithereto, Aindicates the bodyof the machine, bolted to the supports B B, which in turn are bolted to the base-plate G.

G is the horn or anvil, in the upper side of which is fitted the die H.

L and M are two steam cylinders, having each a steam-chest and slide-valves, all correspondin g to the common steam-engine, the said valves being operated by hand-levers 0 P.

T is a piston -rod inserted in the piston R, and secured thereto by the nut V. This piston-rod passes out of both ends of the cylinder through packing-boxes W, and carries at its lower end, a die,b, made fast bya set-screw, c. The end of the die I) is countersunk to the form of a rivet-head, and when brought down upon the point of the heated rivet it upsets a head upon it. The rod U of piston S is a pipe, through which the piston-rod T reciprooates freely, said rod U being firmly secured into piston S. i

e e are vent-holes in rod U to allow free circulation of air.

The above description of riveting-machine is not claimed by me, as it forms no part of my invention, which consists essentially of the work-supporting frame, which I will now proceed to describe.

v7c is a post or upright sliding vertically in the fixed support m, which is rigidly secured in the base portion or bed Eot' the machine. This post is provided with several mortised seats, r, adapted to receive the end of a lever, l, so that it may be raised or lowered, as desired. This lever ljs pivoted or fulcrumed in a post, a, which is held in place on the support at by means of thescrew p.

0 is a foot-treadle attached to the lever l at the end opposite to that which engages the mortises in the post k. At the upper portion or end of post his rigidly secured, at its center, a cross piece forming arms carrying rollers 2', upon which the boiler or other work to be riveted rests and is supported.

The operation of my invention is as follows: The boiler or boiler-ring to be riveted is placed upon the rollers 71 tot the work-support, which should be so adjusted that the inner part of the upper portion of the boiler-ring shall rest upon the die H. This adjustment can be effected by means of the slots rof the post kengaging with the support m. Pressure is now applied to the foottreadle 0, which, through the intermediary of the lever Z, will raise the post 70, carrying the arms j and rollers i, and consequently the work supported on the rollers a sufficient distance from the die H to allow a rivet to be inserted in the hole which has been previously punched. Pressure is now relieved from the foot-treadle and the boiler allowed to settle down on the die H, into which the head of the inserted rivet fits,and the piston Toperated by means of the valve-rods to upset and head the rivet. The above operation is repeated until the necessary number of rivets have been inserted and headed, the rollers i t' readily allowing the boiler or other work to be shifted, so that all portions of it may be presented to the action of the riveting-dies.

Having thus described my invention, what I claim is- 1. In a riveting-machine, the combination,

with the horn or anvil and the riveting-dies, of a work-supporting frame composed of a vertically-movable frame provided with rollers on which the Work rests, and treadle mechanism for raising and lowering the work-supporting frame, substantially as described.

- 2. In a riveting machine, the combination, with the horn or anvil and the riveting-dies, of a work supporting frame composed of the armsj, carrying rollers i, on which the work rests, a vertical post, k, connected with the rollercarrying arms,.and a pivoted lever, 1, connected with the post at one end and the other end connected with a treadle,o,substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

- CHAS. G. JOHNSEN. Witnesses:

J. CHABAUD, WM. SURGo. 

